package com.hp.test.java.mathlogic;

public class CnUpperCaser {
    public static void main(String agrs[]) {
        // 整数
        System.out.println(digitUppercase(0)); // 零元整
        System.out.println(digitUppercase(123)); // 壹佰贰拾叁元整
        System.out.println(digitUppercase(1000000)); // 壹佰万元整
        System.out.println(digitUppercase(100000001)); // 壹亿零壹元整
        System.out.println(digitUppercase(1000000000)); // 壹拾亿元整
        System.out.println(digitUppercase(1234567890)); // 壹拾贰亿叁仟肆佰伍拾陆万柒仟捌佰玖拾元整
        System.out.println(digitUppercase(1001100101)); // 壹拾亿零壹佰壹拾万零壹佰零壹元整
        System.out.println(digitUppercase(110101010)); // 壹亿壹仟零壹拾万壹仟零壹拾元整

        // 小数
        System.out.println(digitUppercase(0.12)); // 壹角贰分
        System.out.println(digitUppercase(123.34)); // 壹佰贰拾叁元叁角肆分
        System.out.println(digitUppercase(1000000.56)); // 壹佰万元伍角陆分
        System.out.println(digitUppercase(100000001.78)); // 壹亿零壹元柒角捌分
        System.out.println(digitUppercase(1000000000.90)); // 壹拾亿元玖角
        System.out.println(digitUppercase(1234567890.03)); // 壹拾贰亿叁仟肆佰伍拾陆万柒仟捌佰玖拾元叁分
        System.out.println(digitUppercase(1001100101.00)); // 壹拾亿零壹佰壹拾万零壹佰零壹元整
        System.out.println(digitUppercase(110101010.10)); // 壹亿壹仟零壹拾万壹仟零壹拾元壹角

        // 负数
        System.out.println(digitUppercase(-0.12)); // 负壹角贰分
        System.out.println(digitUppercase(-123.34)); // 负壹佰贰拾叁元叁角肆分
        System.out.println(digitUppercase(-1000000.56)); // 负壹佰万元伍角陆分
        System.out.println(digitUppercase(-100000001.78)); // 负壹亿零壹元柒角捌分
        System.out.println(digitUppercase(-1000000000.90)); // 负壹拾亿元玖角
        System.out.println(digitUppercase(-1234567890.03)); // 负壹拾贰亿叁仟肆佰伍拾陆万柒仟捌佰玖拾元叁分
        System.out.println(digitUppercase(-1001100101.00)); // 负壹拾亿零壹佰壹拾万零壹佰零壹元整
        System.out.println(digitUppercase(-110101010.10)); // 负壹亿壹仟零壹拾万壹仟零壹拾元壹角
    }

    /**
     * 数字金额大写转换，思想先写个完整的然后将如零拾替换成零 要用到正则表达式
     */
    public static String digitUppercase(double n) {
        String fraction[] = {"角", "分"};
        String digit[] = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
        String unit[][] = {{"元", "万", "亿"}, {"", "拾", "佰", "仟"}};

        String head = n < 0 ? "负" : "";
        n = Math.abs(n);

        String s = "";
        for (int i = 0; i < fraction.length; i++) {
            s += (digit[(int) (Math.floor(n * 10 * Math.pow(10, i)) % 10)] + fraction[i]).replaceAll("(零.)+", "");
        }
        if (s.length() < 1) {
            s = "整";
        }
        int integerPart = (int) Math.floor(n);

        for (int i = 0; i < unit[0].length && integerPart > 0; i++) {
            String p = "";
            for (int j = 0; j < unit[1].length && n > 0; j++) {
                p = digit[integerPart % 10] + unit[1][j] + p;
                integerPart = integerPart / 10;
            }
            s = p.replaceAll("(零.)*零$", "").replaceAll("^$", "零") + unit[0][i] + s;
        }
        return head + s.replaceAll("(零.)*零元", "元").replaceFirst("(零.)+", "").replaceAll("(零.)+", "零").replaceAll("^整$", "零元整");
    }
}